Method of and mechanism for trimming forgings



y 1 J. H. FRIEDMAN 1,305,943

METHOD OF AND MECHANISM FOR TRIMMING 'FORGINGS Filed July 21, 192'?" E" 5 @f Efl Patented May 19, 1931 Um'rso STATES JOHN H. FRIEDMAN, or TIFFIN, 'onro, nssrenon TO THE NATIONAL MACHINERY 00.,

or TIFFIN, onzo METHOD or ANDMECHANISM ,FQR TRIMMING FORGINGS Application filed July 21, 1927; Serial No. 207, 183.

This invention relates to a; method of trimming forgings produced in heading or forging machines, one of the objects being to provide a means whereby, during one cycle of operation of the machine the forging will be severed from the stock and the flashing trimmed therefrom.

With the foregoing and other objects in view the invention resides in certain novel details of construction and in the steps of. the method hereinafter more fully described and pointed out in the claims, it being understood that various changes may be made within the scope of the claims without departing from the spirit of the invention.

In the accompanying drawings there has been illustrated the several methods involved in the formation of a forging and the trimming of the flashing therefrom.

In said drawings:

Figure 1 is a transverse sectionthrough gripping dies showingthe stock in position therein subsequent to the forging operation and showing the flashing between the grip- Wherein the forging'is partially severed from the stock.

Figure 3 is a section through the gripping dies showing the forging completely severed and positioned preparatory to the'severance of the flashing.

Figure 4 is a view similar to Figure 3 showing the relative positions of the parts after the forging has been punched out of its flashing.

Referring to the figures by character of reference 1 designates the stationary gripping die of a forging machine and 2 deslgnates the movable gripping die. The forging or heading die has been shown at 3 These dies are used during the first steps of the method wherein the stock, indicated at S, is fed between the gripping dies and, while firmly held is subjected to the action of the forging die 3 which shapes the projecting portion of the stock and at the same time necessarily produces aflashing such as indicated at F. It is designed to partially sever the forging from the stock by means of .a shear 4 and thereafter the forging is conveyed to a pair of dies indicated at 5 and 6 which actto, support the forging with the flashing F ,extended into grooves 7 formed in trimming dies 8 and which trimming dies r fit snugly about that portion of the forging from which the flashing is to be removed.

During the positioning ofv the forging "between the dies 5 and G and the dies 8, a shear 9 is utilized for-completely severing the forging from the'stock, the die 6 being utilized to press the stock toward the die 5 andagainst the shear to complete the shear ingoperatiomas disclosed, for example, in my copending application number 207482,

forging between the dies. In the structure I illustrated the shear 9 has a recessl0 adapted to be brought to position in line withthe'r forging after said forging has been severed from'the stock, Following this final severe ance, a punching die 11 is brought against one end of the forging and will force it downwardly relative to the trimming dies 8 so that said forging will be punched outof the flashing F which will be left within the grooves 7. During this punching operation 7 the forging is received by the recess 10 as 7 shown in Figure 4; Thereafter the dies are 'openedso as to release the forging'and' the severed flashingl 7 It is to be understood of course-that the step of partially severingthe forging from the stock, as'illustrated in Figure 2,= is not essential incarrying out this invention;

What isclaimed isz I 1. The combination withdies for receiving a forging, and trimming dies adjacent thereto for receiving a portionof the forg- 7 ring, said trimming dieshaving grooves for the reception of a flashing on the forging,

of a shear for severing the engaged forging from stock extendingbeyond the first. named dies, there being a recess the shear adapted 1 e5 filed July 21, 1927. While the forging is i to register With one end of the severed forging, and means for punching the forging out of its flashing in the trimming dies and into the recess in the shear.

2. A combination With a stationary and a movable die for receiving therebetween a forging at one end of a length of stock, and trimming dies movable toward each other adjacent the first named dies for receiving a portion of the forging therebetween, said trimming dies having grooves for the reception of the flashing of the forging, of a shear for severing the forging from the stock, said shear having a recess for receiving one end of the forging, said first named mo'vable die being shift'able against the stationary die to force a portion of the forging against the shear thereby to sever the forgin from the stock of Which it is a part and bring one end of the forging opposite the recess in the shear, and means for punchingthe forging into the recess in the shear, therby to strip the forging from the flashing inth'e trimming dies.

3. The combination with dies for engaging a forging formed of a portion of .a length of stock, of trimming dies having rooves for receiving flashings on the forgmg, a shear for severing the forging from the stock, said shear having a recess adapted to 'aline with one end of the severed forging, a die Working between and close to the trimming dies and the shear, and means for "unching the forging to strip it from the asl'iing engaged by the-trimming dies and direct one end of the forging into the recess in the shear.

' 4 The method of trimming solid blanks which includes the steps of offsetting one end portion of a length of solid stock to form a partly severed blank, shaping the partly severed blank to form a flash, transferring the blank by means of the adhering length of stock t'oa )ositio'n Where it Will-be supported b its ashing, completing the severance of t' e solid blank at the point of offset, and finally punching the blank out of its supported flashing and into the severing means. I

a 5. The combination With dies for guiding a blank and for receiving the flashing 'on the blank, of means for severing the blank from stock extending beyond the dies, and means for punching the blank out of its flashing there being a clearance in the severing. means for receiving one end of the blank following said punching operation, and prior to the return of the severing means to its initial position.

In testimony that I claim the foregoing as my own, I haveh'ereto aflixed my signature.

' JOHN H; FRIEDMAN. 

